It varies, but it usually doesn't get longer than 1-1.5 inches. Every time I trim what's left of my hairline, I trim the face-pubes as well. People at work usually start to call me Amish by the time I think it's ready to trim.

__________________
"Stop giving me credit for those stupid quotes! For that last time it wasn't me! STFU NOOB!" <-- Benjamin Franklin

I wore it longer when I had a goatee. Now that I have a beard I trim it more often. I usually only go 4-6 weeks between trims. I guess I am also in the habit of doing remaining hair and "face-pubes" all at once.

I'm at a solid lumberjack level right now, but working on growing it out like a wizard. I think it's been at least 4 months going on 5 since the last shave, and I'm not shaving again until I'm back in the states in May. It helps being a homeless bum so I don't have anyone bothering me to trim and my girlfriend supports it.

__________________
“… Besides, the Word is the principal part of baptism. If in an emergency there’s no water at hand, it doesn’t matter whether water or beer is used.” ~Martin Luther